Aresearch is a person who works with or for the researcher, and who poses as a participant or bystander. sometimes they have instructions to behave a certain way to see how the actual participant will respond.

Confederate

Explanation:

In psychology and research, a confederate is an individual who seem to be a participant in the experiment but they are actually part of the research team. In other words, they trick real participants to think they are also participants when their actual purpose there is different and usually they have instructions to behave in a certain way to see how the actual participants will respond.

Therefore, we can say that a research confederate is a person who works with or for the researcher, and who poses as a participant or bystander. Sometimes they have instructions to behave a certain way to see how the actual participant will respond.

all cities have a governor

all cities are in states or provnies then country

all cities have people

difference

some are rich

some are poor

some are average